🛠️ Installation & Maintenance

The Cornerstone of Long-Term Excellence for Yawei Transformers

At Yawei Transformer, we believe that the true value of a power transformer is realized not only through superior design and manufacturing, but through correct installation, disciplined commissioning, and long-term professional maintenance. Even the most advanced transformer can only achieve its full service life, efficiency, and reliability when supported by rigorous field practices.

That is why Yawei Transformer provides a comprehensive, standardized, and field-proven installation and maintenance framework, ensuring maximum asset reliability, operational safety, and minimized lifecycle cost for our global customers.

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I. 📋 Meticulous Planning

Pre-Installation Preparation for Reliable Commissioning

Successful transformer operation begins long before energization. Yawei Transformer emphasizes meticulous planning to eliminate risks during installation and commissioning.

1. Logistics, Transportation & Site Acceptance Inspection

Upon arrival at site, a systematic acceptance inspection must be conducted immediately:

• Verify external condition of the transformer tank, accessories, and packing for any signs of transport damage

• Check shock recorders and moisture indicators (if installed)

• Cross-check all components and accessories against the packing list

• Confirm correct storage conditions for bushings, OLTC components, radiators, and accessories

Temporary storage areas must meet requirements for high-voltage electrical equipment, including ground bearing capacity, moisture control, and security protection.

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2. Foundation Verification & Environmental Suitability

Prior to installation and lifting operations, the transformer foundation must be thoroughly verified:

• Load-bearing capacity must safely support transformer weight under full oil-filled conditions

• Foundation levelness and anchor bolt alignment must comply with installation tolerances

• Seismic design requirements must be reviewed for earthquake-prone regions

Environmental assessment includes:

• Ambient temperature and humidity compliance

• Adequate ventilation for heat dissipation

• Fire separation distances and fire protection systems

• Space clearance for installation, inspection, and future maintenance

Special attention is required for indoor substations, compact substations, and space-restricted projects.

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3. Documentation Review & Professional Tooling Readiness

Before installation, engineering teams must fully review:

• Yawei Transformer Installation & Operation Manual

• Project-specific drawings and technical specifications

• Applicable IEC / IEEE / ANSI standards

All lifting tools, oil processing systems, test instruments, and personal protective equipment (PPE) must be inspected, certified, and calibrated in advance to ensure operational safety and precision.

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II. 🏗️ Standardized Execution

Professional Installation of High-Voltage Power Transformers

Yawei Transformer installation procedures strictly comply with IEC, IEEE, and relevant national standards, ensuring consistency, safety, and technical integrity.

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1. Precise Positioning & Mechanical Anchoring

Using designated lifting points and certified hoisting equipment, the transformer is carefully positioned on its permanent foundation. Mechanical anchoring is then completed in accordance with:

• Seismic intensity requirements

• Short-circuit force resistance criteria

• Long-term vibration stability considerations

Proper mechanical fixation prevents displacement during fault conditions and guarantees structural stability throughout the transformer’s service life.

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2. Accessory Assembly & Active Part Protection

Critical accessories are assembled with precision, including:

• High-voltage and low-voltage bushings

• Cooling radiators, fans, and oil pumps

• Buchholz relay and pressure relief devices

• On-Load Tap Changer (OLTC) systems

For large power transformers, Yawei recommends controlled internal inspection of active parts when required, ensuring that windings, core clamping, and insulation systems remain intact after transportation.

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3. Insulating Oil Processing & Moisture Control

Oil handling is the most critical phase of transformer installation:

• Transformer tank is evacuated under deep vacuum to remove air and moisture

• Windings and insulation are dried to specified moisture limits

• Insulating oil undergoes filtration, dehydration, and degassing

• Oil filling is performed under vacuum to prevent moisture ingress

This process ensures high dielectric strength, low partial discharge levels, and long-term insulation reliability.

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4. Pre-Energization Testing & Commissioning Verification

Before energization, comprehensive electrical tests are mandatory, including:

• Winding DC resistance

• Insulation resistance and polarization index

• Turns ratio and vector group verification

• Short-circuit impedance measurement

• Partial discharge testing (where applicable)

Only after all results fully comply with factory data and international standards is the transformer approved for grid connection.

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III. ⚙️ Continuous Assurance

Operation, Maintenance & Asset Lifecycle Management

Long-term transformer performance depends on disciplined operation and proactive maintenance. Yawei Transformer strongly advocates Condition-Based Maintenance (CBM) strategies.

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1. Routine Inspection & Preventive Maintenance

Routine monitoring includes:

• Oil level and oil temperature

• Winding temperature and cooling system operation

• Pressure relief and gas protection devices

• Visual inspection of bushings and connections

Dissolved Gas Analysis (DGA)

DGA is the cornerstone of transformer health diagnostics. Periodic oil sampling allows early detection of:

• Thermal faults

• Partial discharge

• Insulation degradation

This enables early intervention before faults escalate into failures.

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2. Accessory & System-Level Maintenance

• Cooling system efficiency verification

• OLTC operational checks and contact wear assessment

• Tightening and corrosion inspection of electrical connections

• Seal and gasket condition assessment

Oil regeneration and replacement are performed as needed to maintain dielectric performance.

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3. Advanced Online Monitoring & Predictive Diagnostics

Yawei Transformer supports the integration of advanced monitoring systems, including:

• Online DGA monitoring

• Winding hot-spot temperature measurement

• Partial discharge monitoring

• Load and thermal trend analysis

These systems enable a transition from time-based maintenance to predictive, data-driven asset management, maximizing transformer availability and service life.

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IV. 📞 Long-Term Partnership

Yawei Transformer Professional Service Commitment

Yawei Transformer is more than a manufacturer — we are your long-term power system partner.

Expert Commissioning Support

Our experienced field engineers provide on-site supervision for installation, testing, and energization, ensuring safe and reliable commissioning.

Customized Technical Training

We offer tailored training programs covering operation, maintenance, diagnostics, and emergency handling, empowering customer teams with practical expertise.

Global Spare Parts & Emergency Support

Yawei maintains a reliable supply chain for genuine spare parts and provides rapid-response technical support to minimize downtime.

Asset Life Extension & Retrofit Solutions

For aging transformers, Yawei delivers professional condition assessments, technical retrofits, and capacity upgrades to extend asset life and meet evolving grid demands.

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Ready to Strengthen Your Power Assets?

Yawei Transformer is committed to supporting customers in high-voltage transmission, renewable integration, industrial power supply, and complex operating environments through reliable products and comprehensive lifecycle services.

Whether you face a non-standard technical challenge, require long-term maintenance planning, or seek to optimize transformer performance, our expert team is ready to support your project.

👉 Contact Yawei Transformer today to discover how our installation and maintenance expertise can deliver lasting value to your power system.